e50hx: use the new bacnetutil class

This commit removes functionality that is now present in the
bacnetutil class.  This simplifies the driver considerably.  The
examples were modified to reflect the renaming of some utility
functions in bacnetutil.

Signed-off-by: Jon Trulson <jtrulson@ics.com>

src/e50hx/pyupm_e50hx.i

@@ -7,6 +7,7 @@
 %feature("autodoc", "3");
 
 %include "bacnetmstp.hpp"
+%include "bacnetutil.hpp"
 %include "e50hx.hpp"
 %{
     #include "e50hx.hpp"